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Motivation PART I Current operational Bureau wave model assimilates Jason H s only Envisat is received in real-time Potential to expand data assimilation (DA) scheme Need a bias correction scheme for each altimeter PART II Expand model verification scheme to include altimeter observations as well as buoy observations (prelim)

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Determine summary statistics over globe Options: 1. Calculate stats over globe 2. Average statistics over boxes Option 1 will give higher weighting to high latitude regions due to denser observations Option 2 will give higher weighting to high latitude regions due to width of boxes Weight box according to latitude

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Computational Usage 12-hour hindcast and 72- hour forecast SX-6 single processor only Requirements for resolution increase and DA increase are equal Requirements for both are not much more than requirements for one